t S 3t a. The function for the above graph is given by 3 f(x) = x*0, XER The points P and R lie on the curve of the function, and the x-axis coordinates of these points are t and 3t, respectively. The line segment PQ is parallel to the x-axis, and the line segment QR is parallel to the y-axis, and the close region S is defined by the curve and the line segments PQ and QR. Show that the area of the closed region Sis In 2 b. The gradient of a function is given as follows: 5x2-8 g'(x)= x 0 x Find the value of g(-2), given that g(1) = 17-g(2).